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overview
 IPSEC Protocol Overview
IPSEC is a framework for security that operates at the Network Layer by extending the IP packet header (using additional protocol numbers, not options). This gives it the ability to encrypt any higher layer protocol, including arbitrary TCP and UDP sessions, so it offers the greatest flexibility of all the existing TCP/IP cryptosystems.
preview:
http://www.freesoft.org/CIE/Topics/141.htm
1/19/2005
Tags: ipsec
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